Its not just one. This is pretty common knowledge among people in their field.
These are specialists in their field, their opinions don't just come from nothing, they are informed by information from the studies.
My brother used to do chewing tobacco. He would spit into pop bottles. He left one laying around in the kitchen. I tried to steal a sip of what I thought was A&W root-beer. It was the same colour.
What came next was the most disgusting thing I've ever experienced. Imagine drinking someone's thick cold saliva mucus that had a disgusting apple cinnamon and smokey tar taste.
I ran to the sink as fast as I could and spat it out and forced myself to throw up.
I already had some previous NixOS experience, so that might have made it a little bit easier, but other than that, it was pretty seamless. It has OneDrive, Teams in the Nix store, and then I use just the web browser version of Outlook, because it's the exact same as the desktop version. Other than that, yeah, everything's seamless.
I switched my work laptop to Linux(Nixos+Gnome) as soon as I could after they announced they were going to be using an AI in the OS. Been loving it ever since, and the peace in knowing they aren't spying on me as well is a really nice added benefit.
Here you go, this one does. and it's peer-reviewed.
https://plantbasednews.org/news/environment/animal-ag-leading-cause-climate-change/